Tantalum bolts are best known for its unmatched corrosion resistance and chemical inertness. Tantalum bolts have a similar corrosion resistance to that of glass, but all of the typical mechanical and electrical properties of a metal.

Tantalum bolts are also extremely stable at high temperatures, since tantalum has a melting point around 3000°C. High temperature applications require vaccum or inert gas since tantalum may embrittle when used in oxygen rich environments above 250°C. Tantalum bolts are also one of the most bio-compatible metals available and is also radio-opaque due to its high density (16.68 g/cm3).

All tantalum bolts are available in commercially pure tantalum and tantalum 2.5% tungsten (Ta-2.5%W).

Contact us to see if your required tantalum bolts are in stock and how our engineers may help you with your tantalum fastener application.

Tantalum Grades, Specifications and Chemistry

Tantalum (Commercially Pure)

Commercially pure tantalum metal is 99.95% pure tantalum has some o the best corrosion resistant properties of any metal. While its corrosion resistance is exceptional, it is relatively soft and mechanically similar in strength to copper.

Tantalum Specifications: UNS R05200, ASTM B521, B708

Tantalum 2.5% Tungsten (Ta-2.5W)

This grade of tantalum alloyed with 2.5% tungsten provided better overall strength while maintaining its exception corrosion resistant properties. For tantalum fastener applications this is usually preferred.

Tantalum 2.5% Tungsten Specifications: UNS R05252, ASTM B521, B708

Physical Properties

Density 16.6 g/cc

Melting Point 3290 K, 2996°C, 5462°F

Boiling Point 5731 K, 6100°C, 9856°F

Coefficient of Thermal Expansion (20°C) 6.5 x 10(-6) / °C

Electrical Resistivity (20°C) 13.5 microhms-cm

Electrical Conductivity 13% IACS

Specific Heat .036 cal/g/°C

Thermal Conductivity .13 cal/cm(2)/cm°C/sec

Tantalum Tensile Data

Tantalum Iso-Corrosion Curves

Tantalum Corrosion Resistance Table

TANTALUM SHOWS A NIL CORROSION RATE TO THE FOLLOWING MEDIA

For all temperatures up to at least 302F (150C) unless otherwise indicated